Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tri noi snippets" » "van tai noi snippets", "van thi noi snippets", "van toi noi snippets", "van tri doi snippets", "van tri moi snippets", "van tri ngoai snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("van tri noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van tri noi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tri noi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tri noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.